Question

For angle abc
, find the measure of angle ACD.​

Answer 1

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ĺĺ

∠ ACD = 66° + 45°

∠ ACD = 111°

another method:

∠A +∠B + ∠ACB = 180°   ( sum of angles of triangle is 180° )

∠ACB = 180 - 111

∠ACB = 69°

∠ACB + ∠ ACD = 180   ( straight angle )

69 + ∠ ACD = 180

∠ ACD  = 180 - 69

∠ ACD  = 111°

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hope it helps :^)